Type-writing machine.



'-L. R. ROBERTS.

TYPE WRITING MACHINE.

APPLICATION FILED MAY 2, 1914.

Patented Nov. 7, 1916.

-; jayald To all whom it may concern:

BEST AVAILABLE com v UNITED STATES PATENT onnroa.

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NEW JERSEY, ASSIGNOR '10 UNDERWOOD TYPE- WRITEB COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

Be it known that I, LYMAN a citizen of the United States, residie; in Rutherford, in the county of Ber en and State of New Jersey, have invente certain new and useful. Improvements in Type.

Writing Machines, 0 is a specification.

The invention relates to improvements in the construction of the type-bars and their sto s,- used in typewriting'machines.

which the following no object of this invention is to reduce a the noise caused by the operation of the mechine, byproviding a suitable noise-dead 15 .stop, to arrestthe type-bars,

enmg stop in place of the usual solid metal or carriers, just before the types thereon reach the platen.

My im roved stop is of suitable material, and may e made of felt, subjected to great pressure, which renders without the loss of any of its noise-deadening qualities. a

It is understood the the usual stop employed for type-barsto arrest them their type printing action is located in such posit1on 1n the path of said type-bars as-to become effective just a shade in advancepf the contacting position of a type carried thereby with relation to the platen surface, and that the impression stroke of a typebar, through its acquired momentum and the inherent spring-like character of type-bars, causes the type-barto impel the type into its impacting impression contact.

position in their path, but

The cushioned stop which is the subject of this invention has substantially the same relation to the type-bars with regard to its it has the further function of absorbing the shock consequent upon the impression stroke and of deadening the noise attendant thereon. The

type-bars operating in con'unction with this stop are provided with road soles, with Wl11Cl1 to make impact upon a relativelybars are subject when arrested by an 111- fiexible stop.

Specification of Letters Patent. p

R. ROBERTS,

'ing machine,

it almost solid,

y avoiding the ore ation of thehumming' sound to which type v TYPE-WRITING macnrtn'n.

Other features and advantages will ap pear hereinafter.

In the drawings accompanying thisapplicationz Figure 1 is a side elevation, showmg, in section, a portion of a type-writing machine frame, with my improved type-'bar stop, and the relation thereto of type-bars v and platen. Fig. 2 is a perspective detail view, partly broken away, of the type-bur stop. Fig. 3 is a partial plan view of several rtypebars, extended, pacting surfaces.

Fig. i is a perspective elevation of a type-bar, and Fig. 5'is a showing their im- Patented Nov. 7, 1916. Application filed May 2,1914; Serial No. 835,791.

front view of my improved type-bar stop with a typebafarrested there in the usual type of Underwood typewritwith which my present invention is shown as applied, the depression of one of the type-keys 1 rocks a bell-crank 2, to swing a bar 3 with its-type 4, upwardly between a guide 5 against a platen 6. To

secure a clear impression, the bar 3 is ar-.

rested in its movement just before the type at reaches the platen, so thatthe free end of thetype-bar carrying the type will spring forwardly due to the flexibility of the bar.

The type-bars 3 are arrested in their upward movement by a noise-deadening pad 7 which is held by hooks or claws 8 on a re taining plate 9, which is fastened to. the type-bar hanger 10, with screws -1l. $aid pad is substantially of crescent-shape, coinciding with the curvatureof the segmental type-bar hanger 10, to arrest any type bar that may be actuated.

Towprevent the pad from being cutby the type-bars, the latter are provided with broad soles 12, to afford contacting surfaces of relatively large areas. The said soles are arrangedon on each bar, in the example shown herein, and may have the staggered relation indicated for" the purpose of economizing space,'while pre sentmg equal bearing surface at opposite sides of the type-bar.

that these soles extend laterally in opposite directions at right angles to the plane of the type bars and that their front or impact faces are disposed in advance of the front edges of the. type bars (2'-. e., the edges of the bars which face the platenduring the movement of said bars toward said platen). Irrthis way the soles act to positively pre vent the aforesaid bar edges from striking It is to be observed side of a typeagainst the pad or cushion at the moment of impact, with the result that injury to the pad is completely avoided. I

Variations may be resorted to within the scope of the inventii'in. and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a platen, of a type-bar. an operating key therefor, and a noise-dtaidening stop of slightly compressible material arranged in the-path of the type-bar and in position to arrestthe stop-engaging portion of the type-bar before the type thereon reaches the platen, and permitting the type tohe carried by momentum to the platenafter the stopengaging portion is arrested. thetype-bar formed with broad soles projerting'at opposite sides of the type-bar and presenting a large stop-engagingsurface to prevent the type-bar from wearing or cutting into said stop.

In a typewriting machine, the combination of a platen, a series of type-bars formed of resilient.material and arranged to swing to the platen. keys for individually operating the type'l'iars, and a stop consisting of sound-deadening material positioned to ar rest the type-bars before the types carried thereon reach the platen, said tyl'ie-bars having broad soles arranged to impact with relatively large. areas of the stop when engaging the latter. said soles arranged on each side of the type-bars in staggered positions, the resistance of the stop being suiiicient to bring the impacting portions of the typebars to a full stop before the types reach the platen, the resiliency of the type-bars permitting the types to be carried by momentum to the platen.

In a typewriting machine. the combination with a platen, of a type-bar arranged to be swung against the platen, a compressed felt stop in the path of the typebar and positioned to arrest the type-bar as it nears the printing position, the type-bar being formed with a broad sole arranged to strike the stop and thereby prevent the type-bar from cutting into-the stop, the latter operative to arrest the swinging movement of the type-bar, bringing the stop-engaging por-,

. ti on thereof to a full stop before the type strikes the platen. and a retainer provided with claws to hold the material of said stop in position.

4. In a typewriting machine having a platen. a series of t v 'pe-bars arranged toswing toward said platen, and 'a cushirming stop in the path of moveim-nt of said typebars, to be struck by them 111st before the 4 types thereon make impact with said platen,

adjacent type-bars having staggered enlarged surface-contacting portions for engagement with sald stop, the area of said contacting portions being suliieient to limit the compression of the stop due to the imtype, said stop being formed of nearly-solid. material and having a solid backing, whereby said stop-engaging portion of the typebar is brought to a stop before the 'type reaches the printing position, the type stroke being connuleted by momentum; the. typebar having enlargedstop-engaging surfaces projecting beyond the op osite sides of the body of the ty 'ie-bar. I

(3. In a ty iewriting machine having a platen. the combination of aset of pivoted type-bars carrying types arranged to swing to a common printing center. and a sounddeadening stop in the path of the typerhars and positioned to engage portions of the type-bars nearer to their pivots than to the types thereon, as the types approach printing position, each type-bar having enlarged surfaces or soles extending in staggered relation in opposite directions from 'the body of the type-bar in position to engage said stop, the soles which exteudin onedirection from the bars bein' out of, alinement with the soles which extend in the opposite direction, whereby interference between the soles on adjacent bars is prevented. said stop be ing in position to beengaged by thev soles of the type-bars and arrest the saint: just before the types reach the printing point. thetypebars being resilient to enable the throw of the types to be. completed by momentum after the arrest of-the stop-engaging portions of the type-bars.

7. In a. t vpewriting machine, the eombination. with a platen: ofa swinging typebar; and acushiondisposedin the path of the t \'pe-bar for arresting. its swinging movement just before the type-carrying end of the bar reaches the platen, so as trreause said .end to spring by momentum to said platen; said tyi'ie-bar havingfan impact projection thereon which; is[msitioned to 'directly strike the cushion; and "which extends in advance of the forutai'dwlge of "the bar,

to prevent said edge from -eohtacting with said cushion. v

8. In a typewriting machinenation, with a platen; of a' 'sv'v-i fi i im..-

bar; and a cushion disposed'in thepa'th ot arresting its swinging the typebar for Epact projections laterally to one side of the bar, with its impact taco locate ,1 n advance of the forward edge thereof, to prevent said edge from contacting with said cushion.

9. In a typewriting machine, the combi nation, with a platen; of a swinging typebar; and a cushion. disposed in the path of the hype-bar for arresting its swinging movement just before the type-carrying end of the bar reaches the platen, so as to cause saidend to spring by momentum to said platen; said type-bar having a pair of imthereon which are positione'd to directly strike the cushion, and which extend in opposite directions at right angles'tto the plane of the bar, with their impact faces located in advance of the for- Ward edge thereof, to prevent said edge from contacting with said cushion.

' 101.. In typewriting machine, the combination, with a platen; of a swinging typebar; and a cushion disposed in the path of the type-bar for arresting its swinging movement just before the type-carrying end of'the bar reaches the platen, so as to cause said end to spring by momentum to said platen; said type-bar having a pair of projections disposed on opposite sides thereof and provided with flat impact surfaces arranged in position to directly strike the cushion; M 11. In a typewriting machine, the combination, with a platen; of: a swinging typehar a cushion of yielding material disposed in the path of the type-bar; and a retainer provided with claws engaging said cushion to hold the latter in place; said typebar having an impact projection which is positioned thereon to directly strike the cushion just before the type-carrying end of the bar reaches the platen, so as to arrest the swinging movement of said bar and thereby cause its said type-carrying end to spring to said platen by momentum.

LYMAN R. ROBERTS. Witnesses:

TITUS H. Icons, F. E. ALEXANDER. 

